MSNBC commentator Rachel Maddow took aim on Monday at four Republican members of U.S. Congress who announced they would demand an investigation into the Council of American-Islamic Relations during an Oct. 14 press conference, as they promoted a book entitled "Muslim Mafia."

They accused CAIR of attempting to infiltrate Congress – by placing interns on Capitol Hill.

The lawmakers did not ever actually request the investigation of the House Sergeant at Arms.

"They're more motivated by the PR effect of scare mongering about this than they are about any real perceived harm," Maddow said.

"I didn't have anything to do with this, but as an American, I'm sorry," Maddow tells her Muslim guest to end the segment.